428051807 has 2 divisors, whose sum is σ = 428051808. Its totient is φ = 428051806.

The previous prime is 428051777. The next prime is 428051831. The reversal of 428051807 is 708150824.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 428051807 - 2²⁰ = 427003231 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428051707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214025903 + 214025904.

It is an arithmetic number, because the mean of its divisors is an integer number (214025904).

Almost surely, 2^428051807 is an apocalyptic number.

428051807 is a deficient number, since it is larger than the sum of its proper divisors (1).

428051807 is an equidigital number, since it uses as much as digits as its factorization.

428051807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 428051807 is about 20689.4129206220. The cubic root of 428051807 is about 753.6426099563.

The spelling of 428051807 in words is "four hundred twenty-eight million, fifty-one thousand, eight hundred seven".